package net.sky.oa.util;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
   
public class Lunar {  
	private static int year;  
	private static int month;  
	private static int day;  
	private static boolean leap;
	final static String chineseNumber[] = { "一", "二", "三", "四", "五", "六", "七",
			"八", "九", "十", "十一", "十二" };
	static SimpleDateFormat chineseDateFormat = new SimpleDateFormat(
			"yyyy年MM月dd日");
	final static long[] lunarInfo = new long[]{
		0x04bd8, 0x04ae0, 0x0a570, 0x054d5, 0x0d260, 0x0d950, 0x16554, 0x056a0, 0x09ad0, 0x055d2,  
		0x04ae0, 0x0a5b6, 0x0a4d0, 0x0d250, 0x1d255, 0x0b540, 0x0d6a0, 0x0ada2, 0x095b0, 0x14977,  
		0x04970, 0x0a4b0, 0x0b4b5, 0x06a50, 0x06d40, 0x1ab54, 0x02b60, 0x09570, 0x052f2, 0x04970,  
		0x06566, 0x0d4a0, 0x0ea50, 0x06e95, 0x05ad0, 0x02b60, 0x186e3, 0x092e0, 0x1c8d7, 0x0c950,  
		0x0d4a0, 0x1d8a6, 0x0b550, 0x056a0, 0x1a5b4, 0x025d0, 0x092d0, 0x0d2b2, 0x0a950, 0x0b557,  
		0x06ca0, 0x0b550, 0x15355, 0x04da0, 0x0a5d0, 0x14573, 0x052d0, 0x0a9a8, 0x0e950, 0x06aa0,  
		0x0aea6, 0x0ab50, 0x04b60, 0x0aae4, 0x0a570, 0x05260, 0x0f263, 0x0d950, 0x05b57, 0x056a0,  
		0x096d0, 0x04dd5, 0x04ad0, 0x0a4d0, 0x0d4d4, 0x0d250, 0x0d558, 0x0b540, 0x0b5a0, 0x195a6,  
		0x095b0, 0x049b0, 0x0a974, 0x0a4b0, 0x0b27a, 0x06a50, 0x06d40, 0x0af46, 0x0ab60, 0x09570,  
		0x04af5, 0x04970, 0x064b0, 0x074a3, 0x0ea50, 0x06b58, 0x055c0, 0x0ab60, 0x096d5, 0x092e0,  
		0x0c960, 0x0d954, 0x0d4a0, 0x0da50, 0x07552, 0x056a0, 0x0abb7, 0x025d0, 0x092d0, 0x0cab5,  
		0x0a950, 0x0b4a0, 0x0baa4, 0x0ad50, 0x055d9, 0x04ba0, 0x0a5b0, 0x15176, 0x052b0, 0x0a930,  
		0x07954, 0x06aa0, 0x0ad50, 0x05b52, 0x04b60, 0x0a6e6, 0x0a4e0, 0x0d260, 0x0ea65, 0x0d530,  
		0x05aa0, 0x076a3, 0x096d0, 0x04bd7, 0x04ad0, 0x0a4d0, 0x1d0b6, 0x0d250, 0x0d520, 0x0dd45,  
		0x0b5a0, 0x056d0, 0x055b2, 0x049b0, 0x0a577, 0x0a4b0, 0x0aa50, 0x1b255, 0x06d20, 0x0ada0
	};  
   
   	//====== 传回农历 y年的总天数  
	public final static int yearDays(int y) {  
	int i, sum = 348;  
 	for (i = 0x8000; i > 0x8; i >>= 1) {  
     	if ((lunarInfo[y - 1900] & i) != 0) sum += 1;  
     	}  
     	return (sum + leapDays(y));  
 	}  
   
 	//====== 传回农历 y年闰月的天数  
	public final static int leapDays(int y) {  
     	if (leapMonth(y) != 0) {  
     		if ((lunarInfo[y - 1900] & 0x10000) != 0)  
     			return 30;  
     		else  
     			return 29;  
     	} else  
     		return 0;  
 	}  
   
     //====== 传回农历 y年闰哪个月 1-12 , 没闰传回 0  
	public final static int leapMonth(int y) {
		return (int) (lunarInfo[y - 1900] & 0xf);
	}

	//====== 传回农历 y年m月的总天数  
	public final static int monthDays(int y, int m) {
		if ((lunarInfo[y - 1900] & (0x10000 >> m)) == 0)
			return 29;
		else
			return 30;
	}
	public final static int getNonthDays() {
		String date = getDate();
		String[] ym = date.split("-");
		int y = Integer.valueOf(ym[0]);
		int m = Integer.valueOf(ym[1]);
		if ((lunarInfo[y - 1900] & (0x10000 >> m)) == 0)
			return 29;
		else
			return 30;
	}

	//====== 传回农历 y年的生肖  
	final public String animalsYear() {
		final String[] Animals = new String[] { "鼠", "牛", "虎", "兔", "龙", "蛇",
				"马", "羊", "猴", "鸡", "狗", "猪" };
		return Animals[(year - 4) % 12];
	}

	//====== 传入 月日的offset 传回干支, 0=甲子  
	public final static String cyclicalm(int num) {
		final String[] Gan = new String[] { "甲", "乙", "丙", "丁", "戊", "己", "庚",
				"辛", "壬", "癸" };
		final String[] Zhi = new String[] { "子", "丑", "寅", "卯", "辰", "巳", "午",
				"未", "申", "酉", "戌", "亥" };
		return (Gan[num % 10] + Zhi[num % 12]);
	}

	//====== 传入 offset 传回干支, 0=甲子  
	final public String cyclical() {
		int num = year - 1900 + 36;
		return (cyclicalm(num));
	}

	/** */
	/** 
	 * 传出y年m月d日对应的农历. 
	 * yearCyl3:农历年与1864的相差数              ? 
	 * monCyl4:从1900年1月31日以来,闰月数 
	 * dayCyl5:与1900年1月31日相差的天数,再加40      ? 
	 * @param cal  
	 * @return  
	 * @throws ParseException 
	 */
	public Lunar() throws ParseException {
		
		
		Calendar today = Calendar.getInstance();
		DateFormat format = new SimpleDateFormat("yyyy年MM月dd日");
		String data = format.format(new Date());
		today.setTime(chineseDateFormat.parse(data));
		@SuppressWarnings("unused")
		int yearCyl, monCyl, dayCyl;
		int leapMonth = 0;
		Date baseDate = null;
		try {
			baseDate = chineseDateFormat.parse("1900年1月31日");
		} catch (ParseException e) {
			e.printStackTrace(); //To change body of catch statement use Options | File Templates.  
		}

		//求出和1900年1月31日相差的天数  
		int offset = (int) ((today.getTime().getTime() - baseDate.getTime()) / 86400000L);
		dayCyl = offset + 40;
		monCyl = 14;

		//用offset减去每农历年的天数  
		// 计算当天是农历第几天  
		//i最终结果是农历的年份  
		//offset是当年的第几天  
		int iYear, daysOfYear = 0;
		for (iYear = 1900; iYear < 2050 && offset > 0; iYear++) {
			daysOfYear = yearDays(iYear);
			offset -= daysOfYear;
			monCyl += 12;
		}
		if (offset < 0) {
			offset += daysOfYear;
			iYear--;
			monCyl -= 12;
		}
		//农历年份  
		year = iYear;

		yearCyl = iYear - 1864;
		leapMonth = leapMonth(iYear); //闰哪个月,1-12  
		leap = false;

		//用当年的天数offset,逐个减去每月（农历）的天数，求出当天是本月的第几天  
		int iMonth, daysOfMonth = 0;
		for (iMonth = 1; iMonth < 13 && offset > 0; iMonth++) {
			//闰月  
			if (leapMonth > 0 && iMonth == (leapMonth + 1) && !leap) {
				--iMonth;
				leap = true;
				daysOfMonth = leapDays(year);
			} else
				daysOfMonth = monthDays(year, iMonth);

			offset -= daysOfMonth;
			//解除闰月  
			if (leap && iMonth == (leapMonth + 1))
				leap = false;
			if (!leap)
				monCyl++;
		}
		//offset为0时，并且刚才计算的月份是闰月，要校正  
		if (offset == 0 && leapMonth > 0 && iMonth == leapMonth + 1) {
			if (leap) {
				leap = false;
			} else {
				leap = true;
				--iMonth;
				--monCyl;
			}
		}
		//offset小于0时，也要校正  
		if (offset < 0) {
			offset += daysOfMonth;
			--iMonth;
			--monCyl;
		}
		month = iMonth;
		day = offset + 1;
	}
	public static String getDate(Date date) throws ParseException {
		DateFormat format = new SimpleDateFormat("MM-dd");
		String fdate = format.format(date);
		String[] split_date = fdate.split("-");
		int month = Integer.parseInt(split_date[0]);
		int day = Integer.parseInt(split_date[1]);

		return chineseNumber[month - 1] + "月" + getChinaDayString(day);
	}

	public static String getChinaDayString(int day) {
		String chineseTen[] = { "初", "十", "廿", "三" };
		int n = day % 10 == 0 ? 9 : day % 10 - 1;
		if (day > 30)
			return "";
		if (day == 10)
			return "初十";
		else
			return chineseTen[day / 10] + chineseNumber[n];
	}

	public  String toString() {
		return year + "年" + (leap ? "闰" : "") + chineseNumber[month - 1] + "月" + getChinaDayString(day);
	}

	public static String getDate(){
		return year + "-" + (month) + "-" + day;
	}
	public static String getNdate(){
		return chineseNumber[month - 1] + "月" + getChinaDayString(day);
	}
	/*public static void main(String[] args) throws ParseException {
		Calendar today = Calendar.getInstance();
		DateFormat format = new SimpleDateFormat("yyyy年MM月dd日");
		String data = format.format(new Date());
		today.setTime(chineseDateFormat.parse(data));
		Lunar lunar = new Lunar(today);
//		System.out.println(date(today));
		System.out.println(Lunar.getDate());
		System.out.println("北京时间：" + chineseDateFormat.format(today.getTime()) + "　农历：" + lunar);
	}*/
};

